ENVIRONMENTAL FATE OF THREE NOVEL BROMINATED FLAME RETARDANTS IN AQUATIC MESOCOSMS

中观 四溴双酚A 环境化学 化学 微粒 沉积物 光降解 阻燃剂 有机化学 地质学 营养物 光催化 古生物学 催化作用
作者
Benjamin de Jourdan,Mark L. Hanson,Derek C. G. Muir,Keith R. Solomon
出处
期刊:Environmental Toxicology and Chemistry [Wiley]
卷期号:32 (5): 1060-1068 被引量:34
标识
DOI:10.1002/etc.2165
摘要

Abstract Currently, little is known about the environmental fate and persistence of novel brominated flame retardants (NBFRs). The recent detection of NBFRs in sediment cores and air samples provides insight into their persistence and potential for transport. Limited numbers of laboratory studies have examined the fate and behavior of these compounds, but field‐based fate studies have been especially lacking. The authors conducted an aquatic mesocosm experiment to assess the behavior of three NBFRs: bis(tribromophenoxy)ethane (BTBPE), tetrabromobisphenol A bis(2,3‐dibromopropyl ether; TBBPA‐DBPE), and Firemaster BZ‐54, a commercial mixture containing bis(2‐ethylhexyl)tetrabromophthalate (BEHTBP) and 2‐ethylhexyl‐2,3,4,5‐tetrabromobenzoate (EHTeBB) in a ratio of 1:4. Analysis by gas chromatography–mass spectrometry, operated in the electron capture negative ionization mode, revealed partitioning between the particulate and sediment phases, with BTBPE, TBBPA‐DBPE, and BEHTBP identified as being environmentally persistent in both the particulate and the sediment compartments. The median dissipation times (DT50) differed in each compartment, with more rapid disappearance in the particulate (9–30 d) compared with the sediment compartment (>100 d) for each compound. The degradation products were more concentrated in the particulate compartment and corresponded to known photodegradation products. The ratio of EHTeBB to BEHTBP differed in the mesocosm compartments compared with the technical product used for treatment, indicating increased degradation of EHTeBB relative to BETHBP. Environ. Toxicol. Chem. 2013;32:1060–1068. © 2013 SETAC
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